<volist name="cateList" id="vo">
    <dl class="question-class-list">
        <dt><a href="{$cate_url}&cid={$vo.id}">{$vo.name}</a></dt>
        <volist name="vo.child" id="v">
            <dd><a href="{$cate_url}&cid={$v.id}">{$v.name}</a></dd>
        </volist>
    </dl>
</volist>